Avallone Sylvie auteur aut IRD Rojas-Gonzalez J. A. auteur aut IRD Trystram G. auteur aut IRD Bohuon P. auteur aut IRD text journalArticle eng text/pdf born digital access The impact of deep-fat frying on the micronutrient content of plantain (Musa AAB "barraganete") was evaluated during processing of plantain chips called "tostones." Water content, micronutrients (potassium, L-ascorbic acid, alpha-carotene, beta-carotene) content, and the temperature within the food were quantified during the course of frying. A nonisothermal kinetics analysis of the 1st-order reaction (micronutrient degradation) induced by deep-fat frying, particularly in terms of the spatial distribution of temperature, was proposed. The kinetic parameters (pre-exponential factor k(0), activation energy E-a) were identified by nonlinear optimization, minimizing the residual variance between the experimental and theoreticalmicronutrient content. Agreement between model and experimental values was checked. During 1st and 2nd frying, potassium was well retained while carotenoid contents decreased significantly. Moreover, L-ascorbic acid contents decreased significantly, just during 2nd frying. k(0) was identified as well as E-a observed for L-ascorbic acid, alpha-carotene, and beta-carotene as 68.4 to 71.5, 79.6 to 84.9, and 85.9 to 88.6 kJ/mol, respectively. beta-carotene appeared to be more heat-resistant than alpha-carotene and L-ascorbic acid. The behavior of the nutritional markers appears to be the consequence of the thermal and hydric histories of the crust and of the heart of the plantain disk related to heat transfer during preparation of the "tostones." specialized carotenoid heat and mass transfer kinetic analysis L-ascorbic acid potassium 054 74 5 C339-C347 2009 0022-1147 https://www.documentation.ird.fr/hor/fdi:010046113 10.1111/j.1750-3841.2009.01155.x 0022-1147 [F B010046113] https://www.documentation.ird.fr/hor/fdi:010046113 https://www.documentation.ird.fr/intranet/publi/2009/06/010046113.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-07-08 2017-08-23 fdi:010046113 fre